Type-writer desk.



J. VAALER.

TYPE WRITER DESK.

APPLICATION FILED MAY 11. 1912.

Patented Aug. 13, 1912.

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J. VAALER.

TYPE WRITER DESK.

APPLIQATION FILED MAY 11,1912.

1 35,664. Patented Aug. 13, 1912.

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J. VAALER.

TYPE WRITER DESK.

APPLICATION FILED MAY 11.1912.

Patented Aug. 13, 1912.

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UNITED STATFEEPATENT OFFICE.

JENS VAALER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CLEMETSEN COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TYPE-WRITER DESK.

To all whom it may concern: I

Be it known that I, JENS VAALER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Type-Writer Desks, of which.

the following is a specification.

My present invention is an improvement in the mechanism of United States Letters Patent No. 934,861, granted to me September 21, 1909; and it relates, particularly, to improvement in the locking means for securing the carriage in its advance position preparatory to raising the type-writer platform and against rearward displacement by such raising; the object being to simplify the construction of the locking means and improve the operationthereof in automatically locking the carriage in the position stated and releasing it by lowering the platform to the position from which it ismoved backward'ly into the housing.

In the accompanying drawings, Figure 1 is a view in sectional elevation of a deskpedestal equipped with the mechanism of said patent in its improved form, the section being taken on line 1, Fig. 6; Fig. 2 is a side View of the said pedestal with a wall broken away to show the mechanism within it in elevation in the posit-ion of the parts represented in Fig. 1, namely with the platform in its lowered and 'housed position; Fig. 3 is a similar view showing the platform in its withdrawn and raised position; Fig. 4 is a section on line 1, Fig. 6, like Fig. 1, but broken and showing the position of the parts when the platform has been withdrawn and raised; Figs. 5, 6 and 7 are broken sections taken, respectively, on lines 5, 6 and 7 Fig. 4, and Fig. 8 is a perspective view ofthe locking-lever device.

While, as stated in theaforesaid patent, the invention is not only applicable to a desk-typewriter but is equally applicable to other devices adapted to be used in connection with and housed within a cabinet, pedestal or the like, the following description is confined to the mechanism in the pedestal of a desk:

Corresponding rails 8, 8, forming a carriage-track, are secured to the inner faces of thee posite sides of a desk-pedestal, and are astened at their outer endsto the front posts 9 of the pedestal at-circular recesses 10 in their rear faces, each shown to Specification of Letters Patent.

- Application filed May 11, 1912. Serial No. 696,592

Patented Aug. 13, 1912.

be provided with an offset 11 at its inner upper portion; and immediately adjacent to the rear face of each front post the rail thus fastened thereto is provided in its lower edge with a notch 12 forming a catch for the purpose hereinafter explained. The rails are additionally supported, between their ends, by hanger-bars 13.

The carriage is'a pair of similar metal plates 14, 14:, of general rectangular shape, each terminating at its forward end in a nose 15, these plates being rigidly connected near their rear ends by a rod ltibent into yoke-shape, each plate carrying on the outer face of its rear lower corner a peripherallygrooved guide-wheel 17, above which and to one side of its center projects a headed stud 18; and a similar'guide-wheel 19 is journal'ed on the diagonally-opposite corner of each carriage-plate. The carriage is confined on the track to ride thereon by embracing each rail 8 between the grooved wheels on a plate or side, the stud 18'on the latter preventing the carriage from leaving the track. Similar bell-cranks 20, 20 are journaled at their angles to the noses 15 of the two carriage-plates at their inner faces, and other bell-cranks 21, like the forward ones, are journaled at their. angles to the inner faces of the plates near their rear ends, in horizontal alinement with the journals of the forward bell-cranks; and the longer arms of the bell-cranks 21 are connected between their ends by a cross-rod 22, the members 20 and 21 of each pair of the bell-cranks being pivotally connected at the ends of their shorter arms by a bent link 23. Spiral springs 24. 24 connect the crossmember of the rod 16, near its ends, with the rod 22. The platform 25 is firmly secured at its edges to bars 26, each pivotally connecting the members of a pair of the bell-cranks 20, 21 at the ends of their longer arms, these bars bein provided with short inwardly-projecting anges or ledges 27 on the lower edges of their forward ends and with similarly-projecting flanges 28 on the upper edges of their rear portions, to embrace and reinforce the platform; and from the upper edge of each bar, near its forward end, projects a tongue 29 for the purpose hereinafter stated.

As thus far described the mechanism differs only in minor details from that shown in the aforesaid patent, except as to the a section of the lever 32 bent, at 36., to oif- .the .preferredjshape fbestshown in Fig. 8,

having an expanded'and relatively heavy rearend portion, a. recess 33 inthe upper edge of its forward-portion to clear the stud 31, a tongue or pawl 34 adjacent to the recess to enter a notch 12, and a latch 35 to engage a stud 30, this latch extending from set or shoulder it at its lower-edge portion and thereby extend it across the lower edge of the adjacent carriage-side and thus to cause the latch to project at the inner face of that side into the path of a stud 30. The stud 31 serves the same purpose at the forward end of a'carriage-side that the stop'18 serves at the inner end thereof.

The manner of working the typewriterplatform 25, to lower it from its raised and advanced position and introduce it into the pedestal, and to withdraw, raise and ad'- vance it from its housed position, is sub;

stantially the same asclearly described in said patent. When the platform is in its lowermost and housed position, shown in Figs. 1 and 2, the studs 30 are engaged by the latches 35 to lock the bell-cranks against turning, the obstruction which the rails 8 present to the pawls 34: preventing the levers32 from turning by gravity to withdraw the latches from the studs. When the platform is pulled outwardly in the horizontal direction, the forward wheels 19 abut against the posts 9 at the'ofisets 11, which they enter, admitting the noses 15 into the recesses 10. The working of the parts is so timed that in this extreme advanced position of the carriage, whence the raisin of the platform begins, the pawls 34, register with and raised by the dropping of the rear lever-endswhereby the latches 35 are lifted off the studs 30, enter the notches 12 and thus lock the carriage to the rails to prevent the strain in raising the platform from rolling the carriage backwardly on the track, which would tend to disorganize the operation. With the platform raised to the projecting position shown in Fig. 3 the ears 29 enter keepers 37 provided in proper posi tion to receive them on the inner faces of the forward pedestalosts, and thus sup-. plement the support 0 the'platform by the bell-cranks.

To house the platform from its position represented in Fig. 3, it is pulled outwardly far enough to release the ears 2-9, and then by Letters Patent is- 1. In combination, a desk, cabinet, or the like, housing a carriage-track and a carriage movable thereon and carrying bellcranks link-connected in pairs, with a platform pivotally supported on the longer bellerank arms, a catch on the track, astud on 'one of said arms, and a lever fulcrumed between its ends on aside of said carriage totend to drop by gravity at its inner end and provided with a pawl to engage said catch and lock the carriage in its advance-position, and a latch to engage said stud for locking the bell-cranks against turning in the movements of the carriage.

2. In combination, a desk, a cabinet, or the like, housing a carriage-track and a carriage movable thereon and carrying bell-crank levers link-connected in pairs, with a platform pivotally supported on the longer bellcrank arms, catches on the track-rails near their forward ends, studs on said arms, le vers fulcrumed to the carriagesides to tend to drop by gravity at their inner ends and provided with forward pawls to engage said catches and lock the carriage in its advances position, and latches forward of the pawls to engage said studs for locking the bellcranks against turning in the movements of the carriage.

3. In combination, a desk, cabinet, or the like, housing a carriage-track and a car.- 105 riage movable thereon and carrying bellcranks link-connected in pairs, with a platform pivotally supported on the longer bellcrank arms, notches in the lower edges of the track-rails near their forward ends, studs on 110 said arms, levers fulcrumed to the outer faces of carriage sides to 'tend to drop by gravity at their inner ends and provided with forward pawls to enter said notches and lock the carriage in its advanceposition, said levers having shoulders toward their forward ends crossing the lower edges of said sides, and latches forward of the shouldersto-engage said studs for locking the bell-cranks against turning in the inovements of the carriage.

J ENS VAAIJER.

In presence of J. G. ANDERSON, R. A. Scrmnrnn. 

